William deiscoll



(No Model.)

W. DRISCOLL.

MOLD FOR FORMING GRUGIBLES AND OTHER ARTICLES 0F 'PLASTIC MATERIAL.

Patented Oct. Z5, 1881.

INVENTOR d @MM ATTONEYS.

WITNESSBS www N. PETERS. PholvL-ihogmpflar. Washington. D. C`

Timmie@ Smarts PATENT @Fries WILLIAM DItISCOLL, OF TAUN TON, MASSACHUSETTS, ASSIGNOR TO HIMSELF AND H. D. ATWOOD, OF SAME PLACE.

MOLD FOR FORMING CRUCIBLES AND OTHER ARTICLES 0F PLASTIC MATERIAL.

SPECIFICATION forming part of Letters Patent No. 248,722, dated October 25, 1881.

(No model.)

To all whom it may concern Be it known that I, WILLIAM DRIscoLL, ot' Taunton, Bristol county, Massachusetts, have invented a new and uset'ul Improvement in Molds for Forming Grucibles and other Articles of Plastic Materials, of which the following is a specification.

My invention relates to molds for forming cruciloles and articles of pottery-ware; and it consists in a skeleton-frame mold provided with a lining` or backingot' iiexible and porous material, whereby the water pressed from the material or composition in the mold is allowed to escape freely.

In the accompanying drawings, Figure l is a longitudinal section of a Crucible-mold con structed in accordance with my invention. Fig.2 is a horizontal section, and Fig. 3 a perspective elevation, ot' the same.

Similar letters ot' reference indicate corresponding parts.

The mold is made, as usual, in two portions, A A, the line of division being longitudinal. rIhe l'rame consists ot' longitudinal ribs (t u, ot' which there are six or more to each port-ion A, and end pieces or ring-segments b. rI`he ribs c are preferably made of well-seasoned wood, and are cutout to the proper shape and length, and secured to segments b by mortising and screws, or in any suitablemanner, whereby they shall be securely held.

On the inside of the frame is secured the backing c. This is made ot' heavy cloth or other material of iexible and porous character, and is secured by tacking to the ribs, after which it is shaped by blocking. Next to the backing c is a lining, d, of similar material, except that it is iiner. This lining forms the wall ot' the mold, and can be secured in any suitable manner. With thisrbacking and lin ing the water pressed from the composition can escape freely, and the lining will thus be retained in a comparatively dry condition. With a solid backing the lining soon becomes saturated, and must be put aside for washing and drying. The porous backing obviates that difficulty.

The ribs a atthe division of the two parts of the mold are recessed and tted with spiral springsce. These springs project, sothat when 5o the parts are placed together they shall be compressed. and thus tend to separate the mold.

Elliptic or other springs may be used for the same purpose. I do not limit myself in that respect.

In using the mold the two parts will be clamped together by a hoop in the usual manner. As soon as the hoop is removed the springs e will separate the molds a short distance, so that their entire removal is thereby 6o facilitated.

Having thus described my invention, IclaimV as new and desire to si'cure by Letters Patentl. A mold for plastic materials having walls or backing t'orined ot' porous material, sub- 65 stantially as shown and described.

2. In molds, a backing ot' cloth or similar flexible porous material combined with a skeleton-frame, substantially as shown and described. 7o

3. In molds, the backing c and lining d, ot' iiexible porous material, the longitudinal ribs a, and segments b, combined substantially as shown and described.

4. The combination, with a two-part mold, of springs c, substantially as and for the pun pose set forth.

WILLIAM DRISCOLL.

Witnesses:

T. G. MARLEY, CHARLES H. PAULL. 

